Circular-saw machine.



PATENTED DEC. 6, 1904.

F. VON HOLDT.

CIRCULAR SAW MACHINE.

APPLICATION FILED JAN. 28. 1904.

2 SHEETS-SHEET 1.

NO MODEL.

Von

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Witnesses Attorney 2 SHEETS--SHBET 2.

y FATENTED DEC. 6,1904. F. VON HOLDTI CIRCULAR SAW MACHINE.

APPLICATION FILED JAN. 28, 1904.

N0 MODEL.

Inventor Attorney Patented December 6, 1904.

PATENT OFFICE.

FREDERICK VON-HOLDT, OF DENVER, COLORADO.

CIRCULAR-SAW MACHINE.

SPECIFICATION forming part of Letters Patent No. 776,743, dated December6, 1904.

Application filed January 28, 1904. Serial No. 191,0'17- (N0 model.)

To (all whom it may concern:

Be it known that I, FREDERICK VON I-loLD'r, a citizen of the UnitedStates, residing at Denver, in the county of Denver and State ofColorado, have invented certain new and usefull mprovements inCircular-Saw Machines; andI do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in circular-saw machines of theportable type adapted for felling timber- The object of my invention isto provide a machine of this character which will be simple inconstruction, durable in use, efficient in operation, and comparativelyinexpensive to manufacture.

With this and other objects in view the invention consists of certainnovel features of construction, combination, and arrangement of parts,as will be more fully described, and particularly pointed out in theappended claims.

In the accompanying drawings, Figure 1 is a top plan view of my improvedcircular-saw machine. Fig. 2 is a side elevation of the same. Fig. 3 isan end elevation. Fig. 4 is Fig. 5 is a vertical transverse sectiontaken on the line 5 5 of Fig. 1.

Referring to the drawings by numerals, 1 de notes a base provided uponits under side with longitudinally-disposed runners 2 and cornerblocks3, by means of which runners and blocks it is enabled to rest firmlyupon the ground and at the same time to be readily transported. Therunners 2 project beyond the rear end of the base and are formed withopenings 4:, in which a suitable draft device or appliance may beengaged when it is desired to move the machine from place to place.

of a horizontally-disposcd frame 12, which comprises two longitudinalside bars 13, connected by cross-bars 14: and 15 and by a bridgebar 16.The side bars 13 engage and slide in the channel bars or beams 6 offrame 5, as shown in Figs. 3 and 5 of the drawings. The

bridge-bar 16 is disposed adjacent to the front end of the frame orcarriage 12 and has depending from its under side a bracket 17, in whichand the bridge-bar a vertical saw arbor or shaft 18 is journaled.'lhecircular saw 19 is secured upon the upper end of this shaft, andupon its lower portion between said bridgebar and bracket is secured abeveled gear 20, which is in mesh with a similar gear 21, se cured uponone end of a horizontally and longitudinally disposed shaft 22,journaled centrally in the cross-bars 15 and 15. The opposite end ofsaid shaft has secured to it a beveled gear 23, adapted to mesh with asimilar gear 2% upon a vertical shaft 25, journaled at its lower end ina cross-bar 1 1 and at its upper end in a cross-bar 26, connecting theupper ends of vertical standards or uprights 27, secured uponthe innersides of the side bars 13 at a point above the cross-bar 11. Theseuprights 27 and cross-bar 26 form a vertically-disposed frame which isstrengthened by diagonal braces 29, connecting said uprights and theside bars 13. Secured adjacent to the upper end of the shaft 25 is abeveled gear 30, which meshes with a similar gear 31 upon the inner endof a horizontal shaft 32, journaled in a cross bar or brace 33,connecting said uprights 27. Upon the outer end of said shaft 32 is afly-wheel 38, provided with a handle 34, by means of which the same maybe rotated to impart motion to the circular saw through the intermediategearing just described.

The machine is attached to the tree that is desired to be felled byhooks 35, which have their inner ends pivoted or hinged, as at 36, tothe outer ends of curved arms 37, secured upon the under side of thebase 1 at its front end and extending forwardly, inwardly, and upwardlyto permit the curved hooks 35 to be swung back under the saw when it isde sired to engage them with a tree. Said hooks, which are designed tosurround the trunk of the tree, are semicircular-shaped pieces of metaltwisted at about their centers so that their inner ends lie in avertical plane and their outer ends in a horizontal plane. Said outerends are adapted to be secured together by a pin 39 passed throughopenings or apertures 38 formed therein, as shown. The corners of thebase 1 are formed with openings 10, through which a pin or stake may bedriven into the ground to hold the machine steady while in operation.Upon the under side of the base 1 at each of its corners is a hinged pinor stake 41, which is used to support the base in a horizontal positionwhen the ground is uneven or inclined by being driven into the earth asufiicient distance.

Theoperation and advantages of the machine will be readily understoodfrom the foregoing description, taken in connection with theaccompanying drawings. \Vhen it is desired to cut or fell a tree, themachine, with its hooks 35 swung to their open position, is pushed up asclose to the tree-trunk as possible and the said hooks are then closedand fastened by means of the pin 39, as previously explained. The base 1is then made stationary in a horizontal position by means of the hingedpins 41 or by pins or stakes driven into the ground through the openings40. By shifting the saw-carriage 12 longitudinally in its guide-frame 5the edge of the saw may be brought against the tree, and the saw is thenrotated by turning the wheel 33, which may be done by two or more men.The saw is advanced as it cuts through the trunk by sliding the carriage12 longitudinally in the guides 6 of frame 5, and this is preferablydone by hand, an operator holding a forked stick or rod against thecross-bar l4: and exerting just suflicient force to cause the saw to cuteffectively. When the tree to be felled is of very large diameter, thesaw makes as great a cut as possible,while the guide-frame 5 is adjustedupon one side of the base 1, and said frame 5 is then shifted to theother side of the base to permit the saw to make another out upon thesame side of the tree, the two outs forming a kerf approximatelyhalf-way through the trunk. The base 1 of the machine is then swungaround to the opposite side of the treetrunk, and in a similar mannertwo more cuts are made to entirely sever the trunk, as will be readilyunderstood.

It will be understood that various changes in the form, proportion, andthe minor details of construction may be resorted to without departingfrom the principle or sacrificing any of the advantages of thisinvention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is I 1. A circular-saw machinecomprising a base formed with transverse grooves, slidable crossbarsadjustably secured in said grooves, channel-bars secured upon saidcross-bars and serving as guides, a saw-carriage slidably mounted insaid channel-bars, a horizontally-disposed saw upon said carriage, meansfor rotating said saw, and means for securing said base upon the objectto be cut, substantially as described.

2. A circular-saw machine comprising a base formed with transversegrooves, slidable crossbars adj ustably secured in said grooves,channel-bars secured upon said cross-bars and serving as guides, asaw-carriage comprising horizontally and vertically disposed andconnected frames, said horizontal frame being slidably engaged with saidchannel-bars, a saw mounted horizontally upon said horizontal frame, adrive-wheel mounted upon said vertical frame, and gearing between saiddrivewheel and said saw, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

FREDERICK VON HOLDT. l/Vitnesses:

FRANK KIROHHOF, GODFREY SoHIRMo.

